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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Manual head cleaning of HP 6520e printer
I have a printer given to me that does not print properly from the black print
head. There are regular horizontal gaps in every printed head, which I think indicate plugged jets in the print head. I'd like to manually clean the face of the head with ammonia water like I have previously on other printers, but this unit does not seem to offer any easy access to the actual print head. Can anyone suggest the easiest way to get to it, perhaps with a cotton swab? I have tried multiple cleaning cycles, and printing pages of all black with no improvement. They print well except for about 1/8" gaps horizontally every 1/2". |
#2
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Manual head cleaning of HP 6520e printer
Bob F wrote:
I have a printer given to me that does not print properly from the black print head. There are regular horizontal gaps in every printed head, which I think indicate plugged jets in the print head. I'd like to manually clean the face of the head with ammonia water like I have previously on other printers, but this unit does not seem to offer any easy access to the actual print head. Can anyone suggest the easiest way to get to it, perhaps with a cotton swab? I have tried multiple cleaning cycles, and printing pages of all black with no improvement. They print well except for about 1/8" gaps horizontally every 1/2". Thinking about this, since it's one section of the entire print head that seem to be not printing, this might be more likely perhaps to be an electrical problem in the signals to the print head. Any opinions? |
#3
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Manual head cleaning of HP 6520e printer
On Fri, 20 Feb 2015 21:02:37 -0800, Bob F wrote:
Bob F wrote: I have a printer given to me that does not print properly from the black print head. There are regular horizontal gaps in every printed head, which I think indicate plugged jets in the print head. I'd like to manually clean the face of the head with ammonia water like I have previously on other printers, but this unit does not seem to offer any easy access to the actual print head. Can anyone suggest the easiest way to get to it, perhaps with a cotton swab? I have tried multiple cleaning cycles, and printing pages of all black with no improvement. They print well except for about 1/8" gaps horizontally every 1/2". Thinking about this, since it's one section of the entire print head that seem to be not printing, this might be more likely perhaps to be an electrical problem in the signals to the print head. Any opinions? I'd have guessed that any part could clog up. But maybe if all nozzles in one section are clogged it could be electrical. Or a particularly sticky ink? I had a couple of Epson Stylus 860 (IIRC) and did dismantle to the point where I could soak the print heads. But I didn't know about ammonia. The heads travel on a nice shiny round bar which moves to give variable clearance to the paper. As well as freeing the bar it was necessary to disconnect the drive belt and the position-sensing ruler. Not too difficult... Mike. |
#4
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Manual head cleaning of HP 6520e printer
Mike wrote:
On Fri, 20 Feb 2015 21:02:37 -0800, Bob F wrote: Bob F wrote: I have a printer given to me that does not print properly from the black print head. There are regular horizontal gaps in every printed head, which I think indicate plugged jets in the print head. I'd like to manually clean the face of the head with ammonia water like I have previously on other printers, but this unit does not seem to offer any easy access to the actual print head. Can anyone suggest the easiest way to get to it, perhaps with a cotton swab? I have tried multiple cleaning cycles, and printing pages of all black with no improvement. They print well except for about 1/8" gaps horizontally every 1/2". Thinking about this, since it's one section of the entire print head that seem to be not printing, this might be more likely perhaps to be an electrical problem in the signals to the print head. Any opinions? I'd have guessed that any part could clog up. But maybe if all nozzles in one section are clogged it could be electrical. Or a particularly sticky ink? I had a couple of Epson Stylus 860 (IIRC) and did dismantle to the point where I could soak the print heads. But I didn't know about ammonia. The heads travel on a nice shiny round bar which moves to give variable clearance to the paper. As well as freeing the bar it was necessary to disconnect the drive belt and the position-sensing ruler. Not too difficult... I continued exercising the printer occasionally over several days. Finally, today, it started to work better,and after a dozen or more pages of printing big black blobs, the unprinting areas started getting smaller and smaller, until they went away.. It took most of a new black ink tank total to get it working. So I guessthe problem was plugged print heads or the ink path to a section of them, and the ink finally disolved a path through. I hope it keeps working. |
#5
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Manual head cleaning of HP 6520e printer
On Sun, 22 Feb 2015 22:06:46 -0800, Bob F wrote:
I continued exercising the printer occasionally over several days. Finally, today, it started to work better,and after a dozen or more pages of printing big black blobs, the unprinting areas started getting smaller and smaller, until they went away.. It took most of a new black ink tank total to get it working. So I guessthe problem was plugged print heads or the ink path to a section of them, and the ink finally disolved a path through. I hope it keeps working. Don't forget all that ink will have gone somewhere! Don't tip the printer from the horizontal or you may find out where... Mike. |
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